[LangCodeExpander] Update iso639-2 db.
[LangCodeExpander] Update iso639-1 db.
[LangInfo] Don't try to convert "original" to 3-letter code.
[LangCodeExpander] Add special mappings for missing 2-letter codes.
Merge pull request #3653 from ace20022/langCodes

[Fix] Languages codes: Reduce log messages